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davemaygtt
Well-Known Member
Looks incredible. Does it meet your expectations driving wise?
SwissDave
Active Member
Thank you! To be honest I haven't driven it enough yet to tell. I'm very pleased so far, the throttle response is excellent and that was a lot of the problem with my earlier turbo effort using the stone age draw thru carb setup from a Gordini turbo and a crappy old distributor.
Brigsy
Media Mogul. Instagram legend.
Looks well.
Plugs wise, try ngk bcr8es if they will fit assuming its the normal plug size. Escort rs turbo plugs originally iirc. About £2.50 each, i run them at 27lbs of boost on my wasted spark efi setup on my c1j, no issues. I didnt even gap them, fitted straight out of the box.
Plugs wise, try ngk bcr8es if they will fit assuming its the normal plug size. Escort rs turbo plugs originally iirc. About £2.50 each, i run them at 27lbs of boost on my wasted spark efi setup on my c1j, no issues. I didnt even gap them, fitted straight out of the box.
SwissDave
Active Member
SwissDave
Active Member
I've finally solved the spark plug issue!
I basically wanted an NGK BPR8EF but no such thing exists. It needed to be that heat rating, that taper seat spec, a resistor plug so as to not interfere with the ECU and had to have a removable, screw on terminal.
The last bit proved the hardest. I thought I had found the holy grail, after hours trawling the internet, cross referencing part numbers the Denso IT24, according to Sparkplugs.co.uk would be perfect. I was properly gutted when they turned up and the terminals were fixed like most modern plugs and every other otherwise suitable plug that I had found.
so..
I basically wanted an NGK BPR8EF but no such thing exists. It needed to be that heat rating, that taper seat spec, a resistor plug so as to not interfere with the ECU and had to have a removable, screw on terminal.
The last bit proved the hardest. I thought I had found the holy grail, after hours trawling the internet, cross referencing part numbers the Denso IT24, according to Sparkplugs.co.uk would be perfect. I was properly gutted when they turned up and the terminals were fixed like most modern plugs and every other otherwise suitable plug that I had found.
so..
Last edited:
SwissDave
Active Member
I thought it was time for an update. The new spec engine has now covered about 3000 miles, it's been reliable bar a few issues, the turbo support rod needed rethinking as it broke it's fixing bolt to the block a couple of times. In the end I remade it with a bow shape to it instead of straight and that's sorted the problem.
The engine was also running too cool with its low temperature thermostat from CGB so I have fitted an original 89 degree one and the engine likes running a bit warmer.
I took the car to Santa Pod in June and it managed a 15.5 second 1/4, despite a hiccup on launch with just 6 psi boost as it was when it was mapped (measured at the inlet plenum). Since then I have been running it with a stronger wastegate spring and about 9 psi which is quite a bit sharper and seems fine.
I'm hoping to get back to the drag strip on 2nd October, in preparation I have fitted the next spring that came with the Mamba wastegate which should give 12 or so psi.
As the compression is still fairly high at 9:1 I think this is going to be pushing it a bit but I'm hoping for a 14 second 1/4 this time.
The engine was also running too cool with its low temperature thermostat from CGB so I have fitted an original 89 degree one and the engine likes running a bit warmer.
I took the car to Santa Pod in June and it managed a 15.5 second 1/4, despite a hiccup on launch with just 6 psi boost as it was when it was mapped (measured at the inlet plenum). Since then I have been running it with a stronger wastegate spring and about 9 psi which is quite a bit sharper and seems fine.
I'm hoping to get back to the drag strip on 2nd October, in preparation I have fitted the next spring that came with the Mamba wastegate which should give 12 or so psi.
As the compression is still fairly high at 9:1 I think this is going to be pushing it a bit but I'm hoping for a 14 second 1/4 this time.
Cooler than a penguins nuts 
!!
Love it, and I’m sure the guy in the Audi was peddling like hell to beat you as you just put your foot down!!
Love it!!
!!Love it, and I’m sure the guy in the Audi was peddling like hell to beat you as you just put your foot down!!
Love it!!
SwissDave
Active Member
SwissDave
Active Member
Thanks guys, I'm also really pleased with how it drives on the road, it makes boost immediately, no lag at all once over 2200 rpm and the Variomatic gearbox keeps it there.
I have 3 modes of operation for the vario, standard for the car where the vacuum side of things encourages the ratio to change up as soon as the engine is over 1500 rpm, this happens all the time for cruising at lower revs except on full throttle when it is switched off to allow the engine to rev higher for better acceleration.
The first "special" mode I have is just an extra switch on the dash that stops the vacuum trying to increase the gearing so that it runs the engine at higher revs all the time.
The third drag racing mode is to also use the "hill descent switch"
As the name suggests this switch is recommended for use on long hill descents and it applies vacuum to the change-down side of the vario, to give some engine braking.
When used in conjunction with the other switch the engine revs much higher still and in fact will over-rev if you don't turn it off above about 60 mph!
I have 3 modes of operation for the vario, standard for the car where the vacuum side of things encourages the ratio to change up as soon as the engine is over 1500 rpm, this happens all the time for cruising at lower revs except on full throttle when it is switched off to allow the engine to rev higher for better acceleration.
The first "special" mode I have is just an extra switch on the dash that stops the vacuum trying to increase the gearing so that it runs the engine at higher revs all the time.
The third drag racing mode is to also use the "hill descent switch"
As the name suggests this switch is recommended for use on long hill descents and it applies vacuum to the change-down side of the vario, to give some engine braking.
When used in conjunction with the other switch the engine revs much higher still and in fact will over-rev if you don't turn it off above about 60 mph!
Wow!! Great!! 
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